REPORT ON THE RADIOLARIA. 1117 



4. Botryocella quadricellans, n. sp. (PI 96, fig. 13). 



Cephalis quadrilobate ; the helmet-shaped occipital lobe twice as long as the two paired 

 subspherical buccal lobes, and three times as long as the odd spherical frontal lobe. Thorax nearly- 

 spherical, about as long as the cephalis. 



DimcnsioTis. — Length of the shell 01, breadth 0'05. 



Habitat. — Central Pacific, Station 272, depth 4475 fathoms. 



5. Botryocella quadrigemina, n. sp. (PI. 96, fig. 14). 



Cephalis quadrilobate, with two pairs of lateral ovate lobes and complete sagittal constriction • 

 the two occipital lobes nearly twice as large as the two frontal lobes. Thorax ovate, separated 

 from the cephalis by a coUar septum with four cortinar pores (fig. 14). 



Dimensions. — Length of the sheU 0'09, breadth 0'06. 



Habitat. — Indian Ocean, Sunda Strait (Eabbe), surface 



6. Botryocella multicellaris, n. sp. (PI. 96, fig. 12). 



Cephalis multilobate ; occipital lobe helmet-shaped, very large, about twice as long and broad 

 as the frontal half of the shell, which is divided into six to eight small roundish clustered lobes. 

 Thorax subspherical, of about the same size as the cephalis. 



Dimensions. — Length of the shell 0"1, breadth 0'05. 



Habitat. — South Pacific Station 297, depth 1775 fathoms. 



Genus 491. Lithohotrys,^ Ehrenberg, 1844, Monatsber. d. k. preuss. 

 Akad. d.Wiss. Berlin, p. 74. 



Definition. — L ithobotryida with tubes on the cephalis, and with the mouth of 

 the thorax closed. 



The genus Lithobotrys, the oldest and first known of the Botryodea, was founded 

 by Ehrenberg in 1844, and was one of his five oldest genera of Polycystiua. It repre- 

 sented by itself the suborder Botryodea until the year 1860. The numerous species 

 described by Ehrenberg belong to very different genera of Botryodea, and partly also 

 of Spyroidea. Following Butschli (1882) we retain here the name Lithobotrys iox 

 those species, the type of which is Lithobotrys geminata. The genus Lithocorythium of 

 Ehrenberg is for the greater part identical with it. When in the preceding genus Acrobotrys 

 the mouth of the thorax becomes closed by lattice work, Lithobotrys arises. In the latter 

 as well as in the former the number of tubes on the cephahs is difi'erent, and may 

 characterise different subgenera. 



' Lithohotrys=Sitone grape ; \itos, /SoV^t/f. 



